I second Shirley's post.. this can't continue.
As for Ace.. throw it in the trash. I used it in the old days, but the more I have learned the more frightening that drug is. Very much not worth it. Prozac might help a lot.
A lot depends on what he does if you try to touch him. If just avoid, okay, you can work with that. Becomes aggressive/tries to bite or threatens to... that is behaviorist time.
The fact that he WANTS your attention will help. So you do a Nothing in Life is Free program to solidify in his head that you are in control, he doesn't have to worry. It helps build confidence.
Also from Debbie McKean is this section on Calming Signals. They do work.
Two dogs, strangers to each other, meet at the park. Rover slowly blinks as he averts his
eyes and sniffs at the grass. Fido yawns. Rover looks toward Fido, flicks his tongue and then
moves in a wide half circle towards Fido. Fido flicks his tongue in response, then approaches
Rover and sniffs him. Rover stands still until Fido is finished and then he sniffs. Fido goes into
a play bow (front legs extended, butt in the air) and the party is on. They romp and play and
growl and bite and have a wonderful time. Neither has had enough exposure to other dogs
to be well skilled in social nuances, just enough to send calming signals and an invitation to
play. More experienced dogs will produce an entire range of eye movement and body
language in a few seconds, communications that most humans don't even notice, and
commence to playing (or fighting!) in quick order.
We can use these signals to our advantage. Tongue flicking appears to have a number of
closely related meanings. Frantic flicking can mean "I'm very, very nervous! Please calm
down!". Less frantic flicking seems to ask "I'm nervous, but I'm coping, are you OK?". Dogs
noticeably relax if their tongue flicking is answered in kind. A simple lizard impression on our
part can go a long way towards telling the dog that we mean him no harm. When handling a
very nervous dog a stronger way to get the "I'm OK, you're OK" message across is to tongue
flick and slowly blink, or blink and yawn or any combination of these things.
Some dogs never see anything other than their own homes, their own back yards and their
own people. The social skills of these dogs are going to be poor. They may not recognize
calming signals since they've had scant opportunity to learn them or practice them since
leaving their littermates. They may also be so overwhelmed by the strange atmosphere and
people that they are incapable of calming down even if they do recognize the signals.
Conversely, a dog who's been throwing signals at people for years and receiving intermittent
(even if unintentional) positive responses may over-exaggerate his body language and
calming signal usage.
Forehead massage is a very effective means of calming. I think it is a successful method
because it feels good and is an indication that no harm is intended.
What must they think of us? Why would any dog allow himself to be put on his back on an
x-ray table, by two strangers, and have his legs stretched out? Why in the world would any
animal allow us to poke needles into his skin? I've come to believe that well socialized dogs
learn that humans can sometimes be very weird. We do completely outrageous things
without adverse effects to the dog. They learn to be tolerant of our weirdness. Those that
are not tolerant are only displaying normal canine behavior, not something odd. We're the
ones being odd.
The bottom line is that we are strangers to the dog. We are not pack mates. We are not a
known quantity. We are the unknown, the unsafe, a perceived danger. We cannot arrogantly
demand that they cooperate with our efforts to put them in very uncomfortable situations. If
we try very hard, what we can do is communicate our promise to "First, do no harm".<<
I would get a thyroid check, full panel, to make sure some of the behaviors aren't thyroid related. Ditto on eyes and hearing.
Just watch for any signs of fear or aggression. Being bitten is not good for you or the dog.